Problemset - Codeforces

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Codeforces Round 978 (Div. 2)
5 days
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Problems

#	Name
1055A	Metro graphs	900	x10717
1054H	Epic Convolution chinese remainder theorem, fft, math, number theory	3500	x177
1054G	New Road Network constructive algorithms, greedy, math	3300	x290
1054F	Electric Scheme flows, graph matchings	2700	x314
1054E	Chips Puzzle constructive algorithms, implementation, math	2400	x485
1054D	Changing Array greedy, implementation	1900	x2247
1054C	Candies Distribution constructive algorithms, implementation	1500	x4282
1054B	Appending Mex implementation	1000	x6589
1054A	Elevator or Stairs? implementation	800	x9060
1053E	Euler tour constructive algorithms, trees	3500	x202
1051G	Distinctification data structures, dsu, greedy	2900	x396
1051F	The Shortest Statement graphs, shortest paths, trees	2400	x2905
1051E	Vasya and Big Integers binary search, data structures, dp, hashing, strings	2600	x952
1051D	Bicolorings bitmasks, dp	1700	x7403
1051C	Vasya and Multisets brute force, dp, greedy, implementation, math	1500	x9278
1051B	Relatively Prime Pairs greedy, math, number theory	1000	x17143
1051A	Vasya And Password greedy, implementation, strings	1200	x8417
1047B	Cover Points geometry, math	900	x17202
1047A	Little C Loves 3 I math	800	x19890
1046I	Say Hello geometry	2300	x515
1046F	Splitting money implementation	1400	x2773
1046C	Space Formula greedy	1400	x3107
1045J	Moonwalk challenge data structures, strings, trees	2600	x170
1045I	Palindrome Pairs hashing, strings	1600	x4439
1045H	Self-exploration math	2400	x375
1045G	AI robots data structures	2200	x1656
1045F	Shady Lady geometry, math	3400	x101
1045E	Ancient civilizations constructive algorithms, geometry	3200	x234
1045D	Interstellar battle math, probabilities, trees	2200	x671
1045C	Hyperspace Highways dfs and similar, graphs, trees	2300	x701
1045B	Space Isaac hashing, number theory	2400	x514
1045A	Last chance data structures, flows, graph matchings, graphs, trees	2500	x535
1044F	DFS data structures	2700	x569
1044E	Grid Sort implementation	3100	x119
1044D	Deduction Queries data structures, dsu	2400	x1006
1044C	Optimal Polygon Perimeter dp, geometry	2100	x1348
1044B	Intersecting Subtrees dfs and similar, interactive, trees	1900	x1571
1044A	The Tower is Going Home binary search, two pointers	1700	x2898
1043G	Speckled Band data structures, divide and conquer, hashing, string suffix structures, strings	3500	x237
1043F	Make It One bitmasks, combinatorics, dp, math, number theory, shortest paths	2500	x2372
1043E	Train Hard, Win Easy constructive algorithms, greedy, math, sortings	1900	x2732
1043D	Mysterious Crime brute force, combinatorics, math, meet-in-the-middle, two pointers	1700	x4442
1043C	Smallest Word constructive algorithms, greedy, implementation	1500	x6872
1043B	Lost Array implementation	1200	x6277
1043A	Elections implementation, math	800	x10785
1042F	Leaf Sets data structures, dfs and similar, dsu, graphs, greedy, sortings, trees	2400	x1303
1042E	Vasya and Magic Matrix dp, math, probabilities	2300	x1769
1042D	Petya and Array data structures, divide and conquer, two pointers	1800	x6212
1042C	Array Product constructive algorithms, greedy, math	1700	x4707
1042B	Vitamins bitmasks, brute force, dp, implementation	1200	x16057
1042A	Benches binary search, implementation	1100	x12882
1041F	Ray in the tube data structures, divide and conquer, dp, math	2500	x1493
1041E	Tree Reconstruction constructive algorithms, data structures, graphs, greedy	1900	x3587
1041D	Glider binary search, data structures, two pointers	1700	x5977
1041C	Coffee Break binary search, data structures, greedy, two pointers	1600	x9451
1041B	Buying a TV Set math	1000	x13960
1041A	Heist greedy, implementation, sortings	800	x25034
1040B	Shashlik Cooking dp, greedy, math	1300	x7069
1040A	Palindrome Dance greedy	1000	x9560
1039E	Summer Oenothera Exhibition data structures	3400	x271
1039D	You Are Given a Tree data structures, dp, trees	2800	x1816
1039C	Network Safety dfs and similar, dsu, graphs, math, sortings	2200	x1355
1039B	Subway Pursuit binary search, interactive, probabilities	2100	x2365
1039A	Timetable constructive algorithms, data structures, greedy, math	2300	x785
1038F	Wrap Around dp, strings	2900	x329
1038E	Maximum Matching bitmasks, brute force, dfs and similar, dp, graphs	2400	x978
1038D	Slime dp, greedy, implementation	1800	x8372
1038C	Gambling greedy, sortings	1300	x9428
1038B	Non-Coprime Partition constructive algorithms, math	1100	x13567
1038A	Equality implementation, strings	800	x14891
1037H	Security data structures, string suffix structures	3200	x1035
1037G	A Game on Strings games	3200	x303
1037F	Maximum Reduction combinatorics, data structures, math	2500	x1146
1037E	Trips graphs	2200	x2900
1037D	Valid BFS? dfs and similar, graphs, shortest paths, trees	1700	x14797
1037C	Equalize dp, greedy, strings	1300	x18833
1037B	Reach Median greedy	1300	x10387
1037A	Packets constructive algorithms, greedy, math	1300	x11151
1036G	Sources and Sinks bitmasks, brute force, dfs and similar	2700	x380
1036F	Relatively Prime Powers combinatorics, math, number theory	2400	x1597
1036E	Covered Points fft, geometry, number theory	2400	x1645
1036D	Vasya and Arrays greedy, two pointers	1600	x9258
1036C	Classy Numbers combinatorics, dp	1900	x9593
1036B	Diagonal Walking v.2 math	1600	x5699
1036A	Function Height math	1000	x10125
1034E	Little C Loves 3 III bitmasks, dp, math	3200	x639
1034D	Intervals of Intervals binary search, data structures, two pointers	3500	x453
1034C	Region Separation combinatorics, dp, number theory, trees	2700	x881
1034B	Little C Loves 3 II brute force, constructive algorithms, flows, graph matchings	2200	x2145
1034A	Enlarge GCD number theory	1800	x8713
1033G	Chip Game games	3500	x382
1033F	Boolean Computer bitmasks, brute force, fft, math	2800	x391
1033E	Hidden Bipartite Graph binary search, constructive algorithms, dfs and similar, graphs, interactive	2800	x643
1033D	Divisors interactive, math, number theory	2000	x2390
1033C	Permutation Game brute force, dp, games	1600	x5581
1033B	Square Difference math, number theory	1100	x9761
1033A	King Escape dfs and similar, graphs, implementation	1000	x13591
1032G	Chattering	2900	x464
1032F	Vasya and Maximum Matching dp, trees	2400	x955
1032E	The Unbearable Lightness of Weights dp, math	2100	x1682